1/8 of the original amount remains.
It is 1/8 .
Approx 1/8 will remain.
One eighth remains.
sample of problem solving
"MNI" can refer to various things depending on the context, but commonly it stands for "Minimum Number of Individuals," a term used in archaeology and ecology to estimate the smallest number of individual organisms represented in a sample. It is often used in studies involving fossils or animal remains to gauge population sizes. In other contexts, MNI might represent organizations or institutions, such as the "MNI" news service in finance.
It tells what fraction of a radioactive sample remains after a certain length of time.
It is 1/8 .
After three half-lives, only 1/8 (or 12.5%) of the original radioactive sample remains. This is because each half-life reduces the amount of radioactive material by half, so after three half-lives, you would have (1/2) * (1/2) * (1/2) = 1/8 of the original sample remaining.
After 5 half-lives, 3.125% (or 1/2^5) of a radioactive sample remains. Each half-life reduces the sample by half, so after 5 half-lives, there is only a small fraction of the original sample remaining.
An eighth remains.
If I take a radioactive sample of 400 moles of an unknown substance and let it decay to the point of three half-lives I would have 50 moles left of the sample. 1/2 of what is left will decay in the next half-life. At the end of that half-life I will have 25 moles left of the unknown substance or 4/25.
30,000
1.5% remains after 43.2 seconds.
Approx 1/8 will remain.
One eighth remains.
Not sure what you mean by "had-lives". After 3 half lives, approx 1/8 would remain.
Half of the original sample of a radio isotope remains after a half-life period. After two half-life periods, one-fourth of the radio isotope remains.